<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
    <meta name="viewport" content="width=device-width,height=device-height, initial-scale=1, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <META HTTP-EQUIV="pragma" CONTENT="no-cache">
    <META HTTP-EQUIV="Cache-Control" CONTENT="no-cache, must-revalidate">
    <META HTTP-EQUIV="expires" CONTENT="0">
      <script>
        //这段js的最后面有两个参数记得要设置，一个为设计稿实际宽度，一个为制作稿最大宽度，例如设计稿为750，最大宽度为750，则为(750,750)
        ;(function(designWidth, maxWidth) {
          var doc = document,
            win = window,
            docEl = doc.documentElement,
            remStyle = document.createElement("style"),
            tid;
    
          function refreshRem() {
            var width = docEl.getBoundingClientRect().width;
            maxWidth = maxWidth || 540;
            width>maxWidth && (width=maxWidth);
            var rem = width * 100 / designWidth;
            remStyle.innerHTML = 'html{font-size:' + rem + 'px;}';
          }
    
          if (docEl.firstElementChild) {
            docEl.firstElementChild.appendChild(remStyle);
          } else {
            var wrap = doc.createElement("div");
            wrap.appendChild(remStyle);
            doc.write(wrap.innerHTML);
            wrap = null;
          }
          //要等 wiewport 设置好后才能执行 refreshRem，不然 refreshRem 会执行2次；
          refreshRem();
    
          win.addEventListener("resize", function() {
            clearTimeout(tid); //防止执行两次
            tid = setTimeout(refreshRem, 300);
          }, false);
    
          win.addEventListener("pageshow", function(e) {
            if (e.persisted) { // 浏览器后退的时候重新计算
              clearTimeout(tid);
              tid = setTimeout(refreshRem, 300);
            }
          }, false);
    
          if (doc.readyState === "complete") {
            doc.body.style.fontSize = "16px";
          } else {
            doc.addEventListener("DOMContentLoaded", function(e) {
              doc.body.style.fontSize = "16px";
            }, false);
          }
        })(750, 750);
    </script>
    <title>finance</title>
  </head>
  <body>
    <div id="app"></div>
    <!-- built files will be auto injected -->
  </body>
</html>
